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A248378 as a simple table

na(n)
012
121
223
332
434
543
645
754
856
965
1067
1176
1278
1387
1489
1598
16910
17109
181011
191110
201112
211211
221213
231312
241314
251413
261415
271514
281516
291615
301617
311716
321718
331817
341819
351918
361920
372019
382021
392120
402122
412221
422223
432322
442324
452423
462425
472524
482526

[12,21,23,32,34,43,45,54,56,65,67,76,78,87,89,98,
 910,109,1011,1110,1112,1211,1213,1312,1314,1413,
 1415,1514,1516,1615,1617,1716,1718,1817,1819,1918,
 1920,2019,2021,2120,2122,2221,2223,2322,2324,2423,
 2425,2524,2526]